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Why do all insects (that I can think of) start their life in a stage that crawls (usually wormlike of some kind) and usually end their lives in a form that can fly. I cant think of any insects that start being able to fly and then their final form is flightless.
Im guess its because the final stage is the stage that mates and flying is critical to mating in some way.
@dick Its common for animals to loose a capability as an evolutionary advantage. Basically if it isnt benefiting you much then you are wasting energy maintaining the systems for it, so if flying isnt worth the cost it could be lost.
@cobratbq yea but why dont they fly when their born? Vestigial organs make sense.
@freemo Probably what you said, but also for defense. The babies are vulnerable and squishy and slow while the adults are agile and hard and fast (another transition that doesn't seem to happen the other way). Presumably you can divide their lives into the "resource gathering" stage and the "adventuring to procreate" stage.
